Writing instrument



FIG. 1 is a front elevational view of the writing instrument that forms our new design:

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right, front, top perspective view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is another front elevational view thereof.

The broken lines showing the writing tip housing and writing tip are included for the purpose of showing portions of the writing instrument that form no part of the claimed design. 

CLAIM The ornamental design for a writing instrument, as shown and described. 